is_yes()
{
    case $1 in
	# match all cases of t|true|y|yes|on|1
	[Tt]|[Tt][Rr][Uu][Ee]|[Yy]|[Yy][Ee][Ss]|[Oo][Nn]|1) return 0 ;;
	*) return 1 ;;
    esac
}

is_no()
{
    case $1 in
	# match all cases of f|false|n|no|off|0
	[Ff]|[Ff][Aa][Ll][Ss][Ee]|[Nn]|[Nn][Oo|[Oo][Ff][Ff]|0) return 0 ;;
	*) return 1 ;;
    esac
}

MemInfo()
{
    sed -n '/^'$1':/ s/^'$1': *\([[:digit:]]*\).*$/\1/p' /proc/meminfo
}
